[RACERAL]

You would have to take the body off. Cut off the SB motor mounts, call Factory 5 and get you to send you some BB mounts, get the measurments as to where they are located. You would alao have to take the trans tunnel aluminum off and rework the trans tail mounting location. Lotta work. OR you could buy Dave Smiths very own big block car and call it a day. You will also get more response at the two web sites dedicated to Factory 5 cars. Really you can find a BB car that is for sale a whole lot easier and cheaper.
You really don't have to take the body off, but it would make the job a whole lot easier.